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-rw-r--r--test/ares-test-misc.cc460
1 files changed, 460 insertions, 0 deletions
diff --git a/test/ares-test-misc.cc b/test/ares-test-misc.cc
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+++ b/test/ares-test-misc.cc
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+#include "ares-test.h"
+#include "dns-proto.h"
+
+#include <string>
+#include <vector>
+
+namespace ares {
+namespace test {
+
+TEST_F(DefaultChannelTest, GetServers) {
+ std::vector<std::string> servers = GetNameServers(channel_);
+ if (verbose) {
+ for (const std::string& server : servers) {
+ std::cerr << "Nameserver: " << server << std::endl;
+ }
+ }
+}
+
+TEST_F(DefaultChannelTest, GetServersFailures) {
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_set_servers_csv(channel_, "1.2.3.4,2.3.4.5"));
+ struct ares_addr_node* servers = nullptr;
+ SetAllocFail(1);
+ EXPECT_EQ(ARES_ENOMEM, ares_get_servers(channel_, &servers));
+ SetAllocFail(2);
+ EXPECT_EQ(ARES_ENOMEM, ares_get_servers(channel_, &servers));
+ EXPECT_EQ(ARES_ENODATA, ares_get_servers(nullptr, &servers));
+}
+
+TEST_F(DefaultChannelTest, SetServers) {
+ EXPECT_EQ(ARES_SUCCESS, ares_set_servers(channel_, nullptr));
+ std::vector<std::string> empty;
+ EXPECT_EQ(empty, GetNameServers(channel_));
+
+ struct ares_addr_node server1;
+ struct ares_addr_node server2;
+ server1.next = &server2;
+ server1.family = AF_INET;
+ server1.addr.addr4.s_addr = htonl(0x01020304);
+ server2.next = nullptr;
+ server2.family = AF_INET;
+ server2.addr.addr4.s_addr = htonl(0x02030405);
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers(nullptr, &server1));
+
+ EXPECT_EQ(ARES_SUCCESS, ares_set_servers(channel_, &server1));
+ std::vector<std::string> expected = {"1.2.3.4", "2.3.4.5"};
+ EXPECT_EQ(expected, GetNameServers(channel_));
+}
+
+TEST_F(DefaultChannelTest, SetServersPorts) {
+ EXPECT_EQ(ARES_SUCCESS, ares_set_servers_ports(channel_, nullptr));
+ std::vector<std::string> empty;
+ EXPECT_EQ(empty, GetNameServers(channel_));
+
+ struct ares_addr_port_node server1;
+ struct ares_addr_port_node server2;
+ server1.next = &server2;
+ server1.family = AF_INET;
+ server1.addr.addr4.s_addr = htonl(0x01020304);
+ server1.udp_port = 111;
+ server1.tcp_port = 111;
+ server2.next = nullptr;
+ server2.family = AF_INET;
+ server2.addr.addr4.s_addr = htonl(0x02030405);
+ server2.udp_port = 0;
+ server2.tcp_port = 0;;
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers_ports(nullptr, &server1));
+
+ EXPECT_EQ(ARES_SUCCESS, ares_set_servers_ports(channel_, &server1));
+ std::vector<std::string> expected = {"1.2.3.4:111", "2.3.4.5"};
+ EXPECT_EQ(expected, GetNameServers(channel_));
+}
+
+TEST_F(DefaultChannelTest, SetServersCSV) {
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "1.2.3.4"));
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "xyzzy,plugh"));
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "256.1.2.3"));
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "1.2.3.4.5"));
+ EXPECT_EQ(ARES_ENODATA, ares_set_servers_csv(nullptr, "1:2:3:4:5"));
+
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_set_servers_csv(channel_, "1.2.3.4,0102:0304:0506:0708:0910:1112:1314:1516,2.3.4.5"));
+ std::vector<std::string> expected = {"1.2.3.4", "0102:0304:0506:0708:0910:1112:1314:1516", "2.3.4.5"};
+ EXPECT_EQ(expected, GetNameServers(channel_));
+
+ // Same, with spaces
+ EXPECT_EQ(ARES_EBADSTR,
+ ares_set_servers_csv(channel_, "1.2.3.4 , 0102:0304:0506:0708:0910:1112:1314:1516, 2.3.4.5"));
+
+ // Same, with ports
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_set_servers_csv(channel_, "1.2.3.4:54,[0102:0304:0506:0708:0910:1112:1314:1516]:80,2.3.4.5:55"));
+ EXPECT_EQ(expected, GetNameServers(channel_));
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_set_servers_ports_csv(channel_, "1.2.3.4:54,[0102:0304:0506:0708:0910:1112:1314:1516]:80,2.3.4.5:55"));
+ std::vector<std::string> expected2 = {"1.2.3.4:54", "[0102:0304:0506:0708:0910:1112:1314:1516]:80", "2.3.4.5:55"};
+ EXPECT_EQ(expected2, GetNameServers(channel_));
+
+ // Should survive duplication
+ ares_channel channel2;
+ EXPECT_EQ(ARES_SUCCESS, ares_dup(&channel2, channel_));
+ EXPECT_EQ(expected2, GetNameServers(channel2));
+ ares_destroy(channel2);
+
+ // Allocation failure cases
+ for (int fail = 1; fail <= 5; fail++) {
+ SetAllocFail(fail);
+ EXPECT_EQ(ARES_ENOMEM,
+ ares_set_servers_csv(channel_, "1.2.3.4,0102:0304:0506:0708:0910:1112:1314:1516,2.3.4.5"));
+ }
+
+ // Blank servers
+ EXPECT_EQ(ARES_SUCCESS, ares_set_servers_csv(channel_, ""));
+ std::vector<std::string> none;
+ EXPECT_EQ(none, GetNameServers(channel_));
+
+ EXPECT_EQ(ARES_EBADSTR, ares_set_servers_csv(channel_, "2.3.4.5,1.2.3.4:,3.4.5.6"));
+ EXPECT_EQ(ARES_EBADSTR, ares_set_servers_csv(channel_, "2.3.4.5,1.2.3.4:Z,3.4.5.6"));
+}
+
+TEST_F(DefaultChannelTest, TimeoutValue) {
+ struct timeval tinfo;
+ tinfo.tv_sec = 0;
+ tinfo.tv_usec = 0;
+ struct timeval tmax;
+ tmax.tv_sec = 0;
+ tmax.tv_usec = 10;
+ struct timeval* pt;
+
+ // No timers => get max back.
+ pt = ares_timeout(channel_, &tmax, &tinfo);
+ EXPECT_EQ(&tmax, pt);
+ EXPECT_EQ(0, pt->tv_sec);
+ EXPECT_EQ(10, pt->tv_usec);
+
+ pt = ares_timeout(channel_, nullptr, &tinfo);
+ EXPECT_EQ(nullptr, pt);
+
+ HostResult result;
+ ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
+
+ // Now there's a timer running.
+ pt = ares_timeout(channel_, &tmax, &tinfo);
+ EXPECT_EQ(&tmax, pt);
+ EXPECT_EQ(0, pt->tv_sec);
+ EXPECT_EQ(10, pt->tv_usec);
+
+ tmax.tv_sec = 100;
+ pt = ares_timeout(channel_, &tmax, &tinfo);
+ EXPECT_EQ(&tinfo, pt);
+
+ pt = ares_timeout(channel_, nullptr, &tinfo);
+ EXPECT_EQ(&tinfo, pt);
+
+ Process();
+}
+
+TEST_F(LibraryTest, InetNtoP) {
+ struct in_addr addr;
+ addr.s_addr = htonl(0x01020304);
+ char buffer[256];
+ EXPECT_EQ(buffer, ares_inet_ntop(AF_INET, &addr, buffer, sizeof(buffer)));
+ EXPECT_EQ("1.2.3.4", std::string(buffer));
+}
+
+TEST_F(LibraryTest, Mkquery) {
+ byte* p;
+ int len;
+ ares_mkquery("example.com", ns_c_in, ns_t_a, 0x1234, 0, &p, &len);
+ std::vector<byte> data(p, p + len);
+ ares_free_string(p);
+
+ std::string actual = PacketToString(data);
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).add_question(new DNSQuestion("example.com", ns_t_a));
+ std::string expected = PacketToString(pkt.data());
+ EXPECT_EQ(expected, actual);
+}
+
+TEST_F(LibraryTest, CreateQuery) {
+ byte* p;
+ int len;
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_create_query("exam\\@le.com", ns_c_in, ns_t_a, 0x1234, 0,
+ &p, &len, 0));
+ std::vector<byte> data(p, p + len);
+ ares_free_string(p);
+
+ std::string actual = PacketToString(data);
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).add_question(new DNSQuestion("exam@le.com", ns_t_a));
+ std::string expected = PacketToString(pkt.data());
+ EXPECT_EQ(expected, actual);
+}
+
+TEST_F(LibraryTest, CreateQueryFailures) {
+ byte* p;
+ int len;
+ // RC1035 has a 255 byte limit on names.
+ std::string longname;
+ for (int ii = 0; ii < 17; ii++) {
+ longname += "fedcba9876543210";
+ }
+ p = nullptr;
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_create_query(longname.c_str(), ns_c_in, ns_t_a, 0x1234, 0,
+ &p, &len, 0));
+ if (p) ares_free_string(p);
+
+ SetAllocFail(1);
+
+ p = nullptr;
+ EXPECT_EQ(ARES_ENOMEM,
+ ares_create_query("example.com", ns_c_in, ns_t_a, 0x1234, 0,
+ &p, &len, 0));
+ if (p) ares_free_string(p);
+
+ // 63-char limit on a single label
+ std::string longlabel = "a.a123456789b123456789c123456789d123456789e123456789f123456789g123456789.org";
+ p = nullptr;
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_create_query(longlabel.c_str(), ns_c_in, ns_t_a, 0x1234, 0,
+ &p, &len, 0));
+ if (p) ares_free_string(p);
+
+ // Empty non-terminal label
+ p = nullptr;
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_create_query("example..com", ns_c_in, ns_t_a, 0x1234, 0,
+ &p, &len, 0));
+ if (p) ares_free_string(p);
+}
+
+TEST_F(DefaultChannelTest, SendFailure) {
+ unsigned char buf[2];
+ SearchResult result;
+ ares_send(channel_, buf, sizeof(buf), SearchCallback, &result);
+ EXPECT_TRUE(result.done_);
+ EXPECT_EQ(ARES_EBADQUERY, result.status_);
+}
+
+std::string ExpandName(const std::vector<byte>& data, int offset,
+ long *enclen) {
+ char *name = nullptr;
+ int rc = ares_expand_name(data.data() + offset, data.data(), data.size(),
+ &name, enclen);
+ EXPECT_EQ(ARES_SUCCESS, rc);
+ std::string result;
+ if (rc == ARES_SUCCESS) {
+ result = name;
+ } else {
+ result = "<error>";
+ }
+ free(name);
+ return result;
+}
+
+TEST_F(LibraryTest, ExpandName) {
+ long enclen;
+ std::vector<byte> data1 = {1, 'a', 2, 'b', 'c', 3, 'd', 'e', 'f', 0};
+ EXPECT_EQ("a.bc.def", ExpandName(data1, 0, &enclen));
+ EXPECT_EQ(data1.size(), enclen);
+
+ std::vector<byte> data2 = {0};
+ EXPECT_EQ("", ExpandName(data2, 0, &enclen));
+ EXPECT_EQ(1, enclen);
+
+ // Complete name indirection
+ std::vector<byte> data3 = {0x12, 0x23,
+ 3, 'd', 'e', 'f', 0,
+ 0xC0, 2};
+ EXPECT_EQ("def", ExpandName(data3, 2, &enclen));
+ EXPECT_EQ(5, enclen);
+ EXPECT_EQ("def", ExpandName(data3, 7, &enclen));
+ EXPECT_EQ(2, enclen);
+
+ // One label then indirection
+ std::vector<byte> data4 = {0x12, 0x23,
+ 3, 'd', 'e', 'f', 0,
+ 1, 'a', 0xC0, 2};
+ EXPECT_EQ("def", ExpandName(data4, 2, &enclen));
+ EXPECT_EQ(5, enclen);
+ EXPECT_EQ("a.def", ExpandName(data4, 7, &enclen));
+ EXPECT_EQ(4, enclen);
+
+ // Two labels then indirection
+ std::vector<byte> data5 = {0x12, 0x23,
+ 3, 'd', 'e', 'f', 0,
+ 1, 'a', 1, 'b', 0xC0, 2};
+ EXPECT_EQ("def", ExpandName(data5, 2, &enclen));
+ EXPECT_EQ(5, enclen);
+ EXPECT_EQ("a.b.def", ExpandName(data5, 7, &enclen));
+ EXPECT_EQ(6, enclen);
+
+ // Empty name, indirection to empty name
+ std::vector<byte> data6 = {0x12, 0x23,
+ 0,
+ 0xC0, 2};
+ EXPECT_EQ("", ExpandName(data6, 2, &enclen));
+ EXPECT_EQ(1, enclen);
+ EXPECT_EQ("", ExpandName(data6, 3, &enclen));
+ EXPECT_EQ(2, enclen);
+}
+
+TEST_F(LibraryTest, ExpandNameFailure) {
+ std::vector<byte> data1 = {0x03, 'c', 'o', 'm', 0x00};
+ char *name = nullptr;
+ long enclen;
+ SetAllocFail(1);
+ EXPECT_EQ(ARES_ENOMEM,
+ ares_expand_name(data1.data(), data1.data(), data1.size(),
+ &name, &enclen));
+
+ // Empty packet
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data1.data(), data1.data(), 0, &name, &enclen));
+
+ // Start beyond enclosing data
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data1.data() + data1.size(), data1.data(), data1.size(),
+ &name, &enclen));
+
+ // Length beyond size of enclosing data
+ std::vector<byte> data2a = {0x13, 'c', 'o', 'm', 0x00};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data2a.data(), data2a.data(), data2a.size(),
+ &name, &enclen));
+ std::vector<byte> data2b = {0x1};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data2b.data(), data2b.data(), data2b.size(),
+ &name, &enclen));
+ std::vector<byte> data2c = {0xC0};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data2c.data(), data2c.data(), data2c.size(),
+ &name, &enclen));
+
+ // Indirection beyond enclosing data
+ std::vector<byte> data3a = {0xC0, 0x02};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data3a.data(), data3a.data(), data3a.size(),
+ &name, &enclen));
+ std::vector<byte> data3b = {0xC0, 0x0A, 'c', 'o', 'm', 0x00};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data3b.data(), data3b.data(), data3b.size(),
+ &name, &enclen));
+
+ // Invalid top bits in label length
+ std::vector<byte> data4 = {0x03, 'c', 'o', 'm', 0x00, 0x80, 0x00};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data4.data() + 5, data4.data(), data4.size(),
+ &name, &enclen));
+
+ // Label too long: 64-byte label, with invalid top 2 bits of length (01).
+ std::vector<byte> data5 = {0x40,
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
+ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
+ 0x00};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data5.data(), data5.data(), data5.size(),
+ &name, &enclen)) << name;
+
+ // Incomplete indirect length
+ std::vector<byte> data6 = {0x03, 'c', 'o', 'm', 0x00, 0xC0};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data6.data() + 5, data6.data(), data6.size(),
+ &name, &enclen));
+
+ // Indirection loops
+ std::vector<byte> data7 = {0xC0, 0x02, 0xC0, 0x00};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data7.data(), data7.data(), data7.size(),
+ &name, &enclen));
+ std::vector<byte> data8 = {3, 'd', 'e', 'f', 0xC0, 0x08, 0x00, 0x00,
+ 3, 'a', 'b', 'c', 0xC0, 0x00};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data8.data(), data8.data(), data8.size(),
+ &name, &enclen));
+ std::vector<byte> data9 = {0x12, 0x23, // start 2 bytes in
+ 3, 'd', 'e', 'f', 0xC0, 0x02};
+ EXPECT_EQ(ARES_EBADNAME,
+ ares_expand_name(data9.data() + 2, data9.data(), data9.size(),
+ &name, &enclen));
+}
+
+TEST_F(LibraryTest, CreateEDNSQuery) {
+ byte* p;
+ int len;
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_create_query("example.com", ns_c_in, ns_t_a, 0x1234, 0,
+ &p, &len, 1280));
+ std::vector<byte> data(p, p + len);
+ ares_free_string(p);
+
+ std::string actual = PacketToString(data);
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).add_question(new DNSQuestion("example.com", ns_t_a))
+ .add_additional(new DNSOptRR(0, 1280));
+ std::string expected = PacketToString(pkt.data());
+ EXPECT_EQ(expected, actual);
+}
+
+TEST_F(LibraryTest, CreateRootQuery) {
+ byte* p;
+ int len;
+ ares_create_query(".", ns_c_in, ns_t_a, 0x1234, 0, &p, &len, 0);
+ std::vector<byte> data(p, p + len);
+ ares_free_string(p);
+
+ std::string actual = PacketToString(data);
+ DNSPacket pkt;
+ pkt.set_qid(0x1234).add_question(new DNSQuestion("", ns_t_a));
+ std::string expected = PacketToString(pkt.data());
+ EXPECT_EQ(expected, actual);
+}
+
+TEST_F(LibraryTest, Version) {
+ // Assume linked to same version
+ EXPECT_EQ(std::string(ARES_VERSION_STR),
+ std::string(ares_version(nullptr)));
+ int version;
+ ares_version(&version);
+ EXPECT_EQ(ARES_VERSION, version);
+}
+
+TEST_F(LibraryTest, Strerror) {
+ EXPECT_EQ("Successful completion",
+ std::string(ares_strerror(ARES_SUCCESS)));
+ EXPECT_EQ("DNS query cancelled",
+ std::string(ares_strerror(ARES_ECANCELLED)));
+ EXPECT_EQ("unknown",
+ std::string(ares_strerror(99)));
+}
+
+TEST_F(LibraryTest, ExpandString) {
+ std::vector<byte> s1 = { 3, 'a', 'b', 'c'};
+ char* result = nullptr;
+ long len;
+ EXPECT_EQ(ARES_SUCCESS,
+ ares_expand_string(s1.data(), s1.data(), s1.size(),
+ (unsigned char**)&result, &len));
+ EXPECT_EQ("abc", std::string(result));
+ EXPECT_EQ(1 + 3, len); // amount of data consumed includes 1 byte len
+ free(result);
+ result = nullptr;
+ EXPECT_EQ(ARES_EBADSTR,
+ ares_expand_string(s1.data() + 1, s1.data(), s1.size(),
+ (unsigned char**)&result, &len));
+ EXPECT_EQ(ARES_EBADSTR,
+ ares_expand_string(s1.data() + 4, s1.data(), s1.size(),
+ (unsigned char**)&result, &len));
+ SetAllocSizeFail(3 + 1);
+ EXPECT_EQ(ARES_ENOMEM,
+ ares_expand_string(s1.data(), s1.data(), s1.size(),
+ (unsigned char**)&result, &len));
+}
+
+} // namespace test
+} // namespace ares
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